#include <stdio.h>

int main()
{
    int a = 10;
    printf("%p\n",&a);
    int* p = &a;
    printf("%p\n",&*p);
    char ch = 'w';
    char* pc = &ch;
    printf("%zu\n",sizeof(char*));
    printf("%zu\n",sizeof(int*));
    printf("%zu\n",sizeof(double*));
    return 0;
}